The State is soliciting proposals for a project to assist the Department to become as energy efficient as possible through installation of energy or water conservation measures, upgrades, and implementation of optimal operation and maintenance procedures. The Department wishes to implement the proposed comprehensive energy project on an energy performance contract basis. Only proposals that have a return on investment of less than 20 years and reduce real energy consumption and are funded under a guaranteed performance basis will be considered. Savings or guarantees provided by the successful proposer will fully offset the project costs involved for the Commonwealth.